Aurora Lady
Are you looking for a belly button plug that has all colors at the same time?
The Aurora Lady does not have all - but a large spectrum of colors in one go. From pink to light green and blue to light yellow and purple tones, the rainbow shows up in this piercing by LeRoi. Depending on the incidence of light, the three zirconia glitter more strongly in one of the many color directions. The two outer balls have a diameter of 4mm each and the largest rhinestone in the middle is 6mm. They are held by a titanium frame.
The third extra rhinestone at the lower end of the largest zirconia gives this navel piercing a length that is not suitable for the short navel.
 
Nickel free 
This piercing jewelry is made of implantable titanium and is therefore nickel-free and suitable for allergy sufferers.